The Round Flask with Built-In Collapsible Cup is made of 18/8 stainless steel and can hold up to 8 ounces of any beverage. A cavity in the center holds a telescopic collapsible cup. A screw cap and a clip-on snap latch are included in the clever construction of this 5 1/2-inch tall flask, which features the collapsible cup in the center that holds 2 1/2 oz. of liquid. The cup snaps and unsnaps into the cutout cup holder, which has a black leather inlaid circle. When open, the 5/8-inch cup is 2 1/4 inches high. The 4 1/2-inch wide flask comes with room for an imprint on the back, or on the front below the screw top.